Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!eternal-september.org!feeder.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: Jerry Stuckle Newsgroups: comp.os.linux.misc,comp.lang.php Subject: Re: testing email deliverability... Date: Fri, 06 Jun 2014 09:41:05 -0400 Organization: A noiseless patient Spider Lines: 49 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Date: Fri, 6 Jun 2014 13:40:59 +0000 (UTC) Injection-Info: mx05.eternal-september.org; posting-host="3088393e34bc61b3e6a923d0c81ae1e3"; logging-data="11588"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX18aqadlIR9xAR0ly6kIXO5Y2LzPJNgW+CQ=" User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0 In-Reply-To: Cancel-Lock: sha1:2d+ix0Y6D4PLVWyI93bTPXrMRns= Xref: csiph.com comp.os.linux.misc:11196 comp.lang.php:13802 On 6/5/2014 11:36 PM, Chuck Anderson wrote: > The Natural Philosopher wrote: >> On 05/06/14 04:04, Sam wrote: >>> The Natural Philosopher writes: >>> >>>> what I want is a function like >>>> >>>> is_valid_mail("user12345@gmail.com") >>>> >>>> that will return true or false if gmail accepts the user as known (yes >>>> the spam is always @gmail.com) WITHOUT having to write a dns mx >>>> lookup, then connect to socket 25 and etc etc etc.. >>> >>> I'm afraid that you will have to wait until someone invents a telepathic >>> computer, that will be able to accomplishing such an amazinf feat. >>> >>> Until then, unfortunately, a number of inconvenient laws of physics of >>> this universe will prevent anyone from determining whether an email >>> address is deliverable without looking up its MX server, and connecting >>> to the MX server's port 25. >>> >> I meant without me having to write such code,, but it seems someone >> already hass.. >> >> http://www.tienhuis.nl/files/email_verify_source.php > > I feel I'm about to step into a giant pile of doo, but .... Some years > back I used a Windows program from Analogx called listmaster pro to > verify email addresses manually (it is designed to be used with large > mail lists. I never verified more than several at a time). It always > gave me correct positive and negative results. It seems to me that, in > general, an email address can be verified as a valid mailbox - or not. > There are no guarantees, of course, but this program always gave me the > correct result. > And how did it know? For instance - I have three domains. You can send and email to any address at any of the three. But unless it's a valid address, the email ends up in /dev/null. -- ================== Remove the "x" from my email address Jerry Stuckle jstucklex@attglobal.net ==================